Tiny blackspeck on forearm size of the tip of blunt normalpencil (hb2), was on the top of skin i removedvery easily with nail clipper, is skin cancer?

Nobody can guess but: In a normal, healthy teenager, a "tiny black speck" the size of a pencil tip is just a tiny dot on the skin, and is not skin cancer. Dots grow bigger with age, which means as a child grows older, more and more dots will become visible. One can go online to look at pictures of skin dots to see when he or she should worry about a particular dot being suspicious.