Ignoring all air resistance, the sky diver's acceleration is 9.8 m/s^2 downward.
it wouldn't make any difference if he HAD any initial velocity at the moment he left the helicopter ... upward, downward, forward, backward, would not change his acceleration. It would still be 9.8 m/s^2, from the moment he left the chopper until the moment he hit the ground (or anything else)