Rach, you can ease your worries now instead of at the recruitment day. Take a tape measure, mark 212cm from your floor, place a tape mark there, and then see if you can reach it.
(Shoes off, stand fairly close to the wall.) You can be on tip-toe, thn you will know right away without any waiting. As long as you can reach that mark you will be fine.(This is pretty much what they do at the open day too)
Good luck!!!