your child is 7.55kg, and that is
at the 46th percentile for weight.

your child is 68.5cm, and that is
at the 85th percentile for height.

your child has a head circumference of 45cm, and that is
at the 87th percentile for head circumference.

So, if he continues as he has been, then as an adult he will be around 185-191cm (6'1"-6'3").

That means he will be will be able to play Darth Vader (6'1" pre suit/6'7.5" post suit), to my Emperor Palpatine (5'8")...  Coolio!