5 lb is about average at 34 weeks and so is 19 inches long. (It's at the top of the average but still in a very normal range). As above said they can be off with weight as it is just an estimate so try not to worry. I always look at it as the chunkier the better, the more baby fat they have the better they can regulate their temp etc. And they look so cute when chubby lol. Good luck with everything.
At my last ultra sound at 31 weeks my baby's weight was at 4lbs! And measuring two weeks ahead.
I really wouldnt worry about it,its certainly not an overly big baby and remember too they can be a good bit off too as babys weight is just estimated,its not very accurate
I just turned 34 wks yesterday
How many are you?my baby weighed 5lb 15oz last week,i was 35 weeks