Does this mean yes or maybe no

Iq scores for adults age 20 to 34 years are normally distributed according to n(120, 20). in what range does the middle 68% of people in this group score on the test?

Evaluate 8j -k+148j−k+14 when j=0.25j=0.25 and k=1k=1.

Answer pls man im trying to get out of summer school