I'm 6'2 and I really wanna dunk,how much does my vertical got to be?
I can't palm the ball also so yea
Just practice jumping with weights around your ankles. You could also try power running up walls to increase you leg muscle strength. Basically all you can do is practice, practice, practice.
6 inches is a good requirement for a dunk. One needs to train his or her legs to be able to deliver that much force that is required for dunk. You just need to do a lot of practice.
How high is the basket? U need to jump higher than that!