Within one standard deviation of the mean does, by definition, fit most people for a normally distributed factor like height. (64% > 50%, thus most). "Within 1

Within one standard deviation of the mean does, by definition, fit most people for a normally distributed factor like height. (64% > 50%, thus most). "Within 1 standard deviation of the mean" is a decent (if possibly overly strict) definition for "normal" in this context.