37 week ultrasound!!! :)

I had my 37 week check up and 3rd trimester ultrasound today... baby is estimated to currently be 7 lbs. 2 oz. And is head down but no dilation yet... if she keeps this up she'll be a stout 8 lbs 9 oz at 40 weeks... also measuring in 64 percentile which I don't get that part if someone could help me understand that!!??? Please! How much was your babies weighing at 37 weeks? She's all smoushed up in there!!!