a question is asking me to use the 68-95-99.7 rule to give a range of scores that includes 95% of the students in a 12 grade graduating class. Does

a question is asking me to use the 68-95-99.7 rule to give a range of scores that includes 95% of the students in a 12 grade graduating class. Does this mean i just find the 95 rule? i.e. approximately 95% of observations between mean-2standard deviation and mean+2standard deviation?