Danielle,
the reach test is to see if you would reach the equipment on board. It doesn't matter what your height is, so long as you can reach 214cm from the ground. So put a mark on your wall this high and if you can touch just above it you will be fine to attend!
Test is done without shoes on but you are allowed to be on your toes. Alo standing closer to the wall helps and is allowed. Good luck!