Height does not matter when picking a board. How much do you weigh and how big is your foot? You want the width of the board at the bindings to be equal or slightly smaller than your foot. Your weight and style of riding will tell you how much flex you want in a board. Stiffer board for freeride and big jumps, softer for park.
I guess I shouldn't have said height doesn't matter, but weight and shoe size are a better way to size the board for most people. If you really want your stance narrower, you can get different center plates for your bindings. The ones that came with my ride bindings have slots instead of holes for the screws, so just by loosening the screws and sliding the bindings I can adjust stance about 2" wider or narrower.
Yeah mine has something similar, but then I have no toe/heel adjustment and end up with my boots being way too far on one side (major toe hang). essentially I'm screwed. Looking for a smaller board