Dad is 5'6.5, mom is 5'3. (dad side) grandpa and uncles at 5'8-5'9. 168cm (15) 169.5cm(15 close to 16) 170cm-171cm(16 to 17 in 3 months). am i going to plateau? started ejaculating at ~11years old. what are your thoughts on my height?

Expected height: The expected final male height is the average of the 2 parents plus 5 cm. +/- . That common projection would place your current height above expected. If you have not grown an inch in the past year it is likely you are near your final height. Most males stop at 17. An x-ray of your wrist/hand could determine whether there is room for more growth.