Answer:
The value of h = 6 and the phase shift is 6 units to the left.
Explanation:
Definition: For a parent function y =f(x),
the transformation y=f(x+h) is a shift of the function either right or left.
If h < 0 ; then the shift is a right shift by h units
If h > 0 ; then the shift is a left shift by h units.
Given the function:

by definition;
h = 6 > 0
⇒in the given function, the shift is 6 units to the left.
Therefore, the value of h = 6 and the phase shift is 6 units to the left.