Primary: Sign Language, Braille, Abnormal Psychology, Acting
The best thing to do to avoid suspicion is to stand out like a sore thumb.
They could pretend to have been previously handicapped in some way.
No one would blame a deaf man for not knowing pop songs and pop culture references.
No one would blame a blind man for not knowing about the latest movies and how to use a smartphone.
No one would blame a schizophrenic person for not accepting that we put colonies on Mars decades ago.
Acting is the skill that will let them pull these off, and they have a few years to prepare their special identity.
They should learn and immerse themselves in the role they pick; eg.if it is blindness, they should live blindfolded and experience the use of braille. Although they should not expect braille, sign languages, etc, to remain the same in 150 years, the immersion allows them to have an impeccable performance.
Bachelor of Applied Science Degree
Another useful skillset: skills in working with technology. By educating themselves on programming and using/making hardware, especially the basics, the foundational skills the person develops will still serve them well in 150 years.
Even if the technology itself changes wildly, the principles behind solving problems, and working with developing on systems will not. With these skills, the person will have less trouble understanding the basic working principles of any new technology in the future, and will be able to figure out how to use the basic technology much more easily.
To get the basic skills, it should be enough to spend a few years to get an Electrical/Software/Computer Engineering degree and working a job /internship or two as a software/electrical engineer.
and if the world had gone full apocalyptic in 150 years, they would be able to use the basics to make a talking volleyball as a companion, and perhaps repair a power generator or two.
Insurance: Hacking and Cash
But those alone won't let a supposedly dead, full grown person from a 100+ years ago not raise flags on the records when they show up looking very much alive.
They will need to either obtain some hacking skills, or, much more easily (and much more reliably, considering the changes in computer security and design in 150 years), enough jewelry or valuables to pay off the local government or cartel of a shady country for some new identity papers, no questions asked.
The jewelry/valuables should be well-made, rare, and have some sort of historical value. If it is kept in pristine condition for 150 years, chances are that collectors will pay large amounts to obtain them, and this will come very much in use for paying for things in the future.
One other thing to do in this situation is to invest (gamble) a small portion of their wealth in a small amount, but large variety of different untraceable cryptocurrencies (no stocks, those are much more conspicuous). Given enough time, one or two of them may survive and grow to be worth astronomical amounts compared to how much they are worth at their inception.
After some consideration, and from thoughts mentioned by the comments, the probability of a cryptocurrency surviving is quite small, and due to 150 years being a long time, changes to security could make it very hard for the person to safely withdraw and use the currency without divulging their identity. The return is not worth the potential risk, so jewelry and collectibles would still be more reliable.
Fingerprint Modification, Hair Implants, and Someone Else's Eyeballs
If they end up waking so far in the future, bio-metrics may be prevalent to the security of the new world. If records of them already exist in the present time, they will need some replacement fingerprints, hair implants, and eyeballs to potentially fool fingerprint scanners, DNA scans, and iris scans.
Carrying Out The Plan
With whatever body condition they pick, they can step out into the new world. Firstly, they will 'dig up' a century+ old 'familial inheritance', and sell some for a reasonable price to the nearest shady pawn shop.
They will then need to pick up a set of identity papers and records for their new identity, along with identities listing out their disability. As @cmaster has mentioned, cryptochips or an equivalent, which may be inserted at birth, may also be present as a form of identity verification in the future. In this case, they will have to ask for an implant of a fake chip while they pick up their papers.
Then they will visit a hospital, and 'correct' their disability with their 'newfound' wealth.
As @Philipp has mentioned, some may be suspicious as to why they would take so long to correct their handicap, in a world so advanced. I have doubts as to whether 150 years is enough to solve the question of poverty, so they can probably claim that they were too poor to afford treatment. If, however, the world has somehow implemented universal healthcare, in every country, they can use their acting skills to fib. Maybe they were kidnapped by a gang as a child and never got fair treatment. Maybe they were living on that one island that never learned. Maybe they wanted to remain blind because reasons, but the person they love has been diagnosed with a fatal condition, and they got the surgery to see them one last time. A good actor/conman can always figure something out.
If any of their behavior seems to be strange in the future, they can say that they have been rehabilitating from whatever condition they had in the past. To rehabilitate themselves from the Cultural Shock they will inevitably experience, they can then use their funds and identity documents to attend the future equivalent of a College or University.
It is also recommended that they pick up the latest copy of a fashion magazine, and do some window shopping to fit in with the fashion trends of the century.