5 foot 9. or maybe just under.
69 inches * 2.54 cm/inch ~ 175cm
For a female with 175cm height, a normal weight is 64kg. For a male with 175cm height, a normal weight is 67.5kg. A model who weights 54kg and is 175cm tall is underweight, so personally I don't think she/he has a healthy BMI.
Just saw a pair of 175cm with bindings for $8 at the thrift store.
5'9 or 175cm