A piper pa-28, n3011f, was in vfr cruise flight heading eastbound at about 5700′ msl, as a cessna 210 (parachute jump plane) had just completed a clearing turn to a westbound heading, into the sun, at 7300′ msl. A parachutist jumped from the jump plane & struck the vertical stabilizer of the pa-28 after a few seconds of free fall. Control of the pa-28 was lost, & it crashed in an uncontrolled descent.