Honcho,
Take this with a grain of salt, but I believe the proper way to interpret the data you were given is as follows:
1 N is 9.8 kgf (kilograms-force), and the shocks have a 75mm stroke, which means that 1 revolution is a 150mm round-trip. Thus 84 rpm corresponds to (84 rpm)*(.15 m/rev)*(1...