Can light weights like 6lbs of dumbells affect height? when you are already old in working out without weights?

I'm only 14 years old and I started working out 5 months from now without weights like push ups,sit ups,crunches, and hand grips I used this exercises to build chest(pectorals),shoulders(deltoids),(tr… abs,although i plan to buy weights that is not heavy enough to challenge myself cause i wanted to strengthen my neck(trapezius) muscles with upright rows,to increase the inch of my forearm with wrist curls,and toning my back(dorsal)muscles with dumbell row...so pls.....