Find the missing number in each sequence, there are 2 questions. I will give 15 points for it, please don't put wrong answers.

Solve the x in the equation x^2+14x+17=-96

Extra points! find the missing dimension! need asap

The distribution of a sample of the outside diameters of pvc pipes approximates a symmetrical, bell-shaped distribution. the arithmetic mean is 14.0 inches, and the standard deviation is 0.1 inches. about 68% of the outside diameters lie between what two amounts?