Which proportion could be used to solve for the height of the tree? ​

Match each function with the corresponding function formula when h(x)=5-3x and g(x)=-3+5

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?

The anwser cause i do not understand just plez