The graph of f(x-2) is the graph of f(x) shifted right by 2 units.
The x-coordinate of the vertex of f(x-2) is the x-coordinate of the vertex of f(x) plus 2, so it is 2+2=4.
The y-coordinate of the vertex doesn't change.
The vertex of the parabola defined by g(x)=f(x-2) is (4,-1).