In order to see what kind of arch on your foot you have, here are ways you could figure it out.
Materials:
water
brown paper towel/Newspaper
1. Wet one of your foot
2. Make sure that they are really wet
3. Place your foot on the paper, or newspaper.
It should come out something like this


High arch often get harder shanks for pointe shoes
Normal gets medium shank for pointe shoes
Flat usually get soft or super soft for pointe shoes
You could improve your arch my using a thera- band or point your toes at home, using toes to pick up things...
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