That's close to my 13 year old daughter's inseam and she is on 170mm cranks on both her mountain bikes and 165s on her BMX Race bikes.
Until recently, she had one mountain bike and I had 160mm cranks on it. Bought her a second bike with 170's fully expecting to swap them for 165s, but after riding the bike with 170s she told me she prefers the 170s. It seems like this should be too much crank for her, but but she isn't wagging her hips riding them (a sign they are too long). She isn't getting any discomfort, and seems faster so I'm leaving them. So she's 5'2 and I'm 5'11 and we ride the same cranks.
So I guess my point is, they may work fine for someone with that inseam. I think it depends a bit on the individual. My daughter is into martial arts and super flexible, where I'm old and NOT flexible, so I think that makes a big difference.