First, we need to calculate the distance from C to F as:
Distance = F - C
Distance = 5 - ( -4)
Distance = 5 + 4
Distance = 9
Then, we can calculate 1/5 of that distance as:

Finally, the coordinate of point H is:
H = C + 1.8 = -4 + 1.8 = -2.2
Answer: H = - 2.2