Adding a little physics.
The height of a jump is based on your launch velocity, which is directly related to the energy you can transfer to your center of mass during the short time period you have while pushing off the ground.
For a first order approximation, your lunar launch velocity would be the same as your earth launch velocity. For a simple example, lets pretend gravity is 9 meters per second squared and the moon is 1.5 meters per second squared (to keep math very simple) and we further assume your vertical launch velocity is 4.5 meters per second (considerably more than real world)
On earth, is will take you 0.5 seconds to lose reach the top of your jump. Since your average velocity will be 2.25 meters per sec. you would raise your center of mass by 1.125 meters during that time.
On the moon, you will have the same average velocity, but it takes you 6 times as long to decelerate you to the top of the jump, so you spend 3 seconds at an average velocity of 2.25 meters per second and you jump 7.75 meters high - exactly 6 time as high.
Secondary effects are a bit harder to compute and they will depend upon the person and conditions. 1) Because lunar gravity is smaller, you will actually spend less time during the launch phase (you are accelerating your body against weaker gravity, thus it accelerates more rapidly reducing contact time with the ground, 2) You may be able to start your jump with your knees bend deeper because you can generate positive thrust with less force.
These two effects tend to cancel each other out, though I expect in able bodied people, the first effect will be greater, resulting in jump a little bit less than 6 times as high on the average.
Of course, muscle loss will very quickly become a factor in reduced gravity reducing the jump further.
Unless your dome is made of condensed matter, you can safely ignore its gravity effect.
(Fixed stupid factor of 2 error in initial post)
Had a little spare time, and looked up real-world vertical leap - For men, average leap was 16-20 inches and excellent was over 28 inches. Best of the NBA players was over 40 inches.