a parabola with an axis parallel to the y axis with vertex (h,k), focus (h,k + p), and directrix y = k − p, with p being the distance from the vertex to the focus has eqn:
(x-h)^2 = 4 p (y-k)
Yes, p is the distance from the vertex to the focus, which we can find in this case by taking:
y(focus)-y(vertex) = 5 - - 6 = 11
So yup, you got it all right!