Whether a suit looks good for your height just depends on the proportions of the suit compared to your body. A short guy can wear a suit just as well as a tall guy (or vice versa), if he has the right length jacket. This is because the jacket divides the body into two visual sections, the primary effect of which is to either visually shorten or lengthen the legs. Shorter guys look stubby if their jacket is too long and cuts through their thighs.

Hint: many clothes come in [S]hort, [R]egular, and [T]all length variations. It's good to figure out which one you are and buy the appropriately proportioned one, or err on the side of too long and have a tailor crop it for you.