It all depends on the deers nutrition and genetics. The antler will grow until about the very end of august , depending where you live.
To give you some in sight I saw a full 8 point with 6 to 8 inch tines already

so to now how much your deer will grow is tough to estimate.
Oh, just so you know the inch of growth is including all tines together, not meaning each tine will grow a inch each in a week.