well it depends if you got a good running and jump technique.
I personally think you can get higher doing a run then jump as you use your speed as well as a good bounce and do what i call 'brick wall affect'
(run as fast as you can then do a long stride, then use all your speed to force you up, not forward 'like a brick wall is in front of you'.)
but to start off I would say jumping on the spot will get you higher. As every jump will get you higher until you hit your max height.
best way to practice this is to hold onto a lamp post and jump. Practice bouncing and feeling yourself go higher on each bounce.
hope that helps.