Find a point on the surface of z = 8- 3x^2 - 2y^2 at which the tangent plane is perpendicular to the line x = 2 - 3t, y = 7 + 8t, z= 5 - t. Find the equation of the tangent line at that point.

I don't know how to find the point. I only know how to find the equation of the tangent plane to the surface at a certain point.