Multiple ways.
1) set one of front Fn buttons to AF selector and then use front and rear dials to move AF point. This is fastest method to any camera.
2) Set one Fn button as AF home (AF HP) and pressing it will switch between two modes, a home that is registered point by you and the size and then the normal your another selected point and size. When you press HP button the AF point changes to size you set and jumps to position you registered. Press again and it jumps to previous again. This way you can have ie. Single small point at any position and then secondary registered 9-point at center for fast situations, pressing HP button would jump between these two then.
3) Set AF point by touching a touch screen, just disable the AF+Release and use just AF. This is great when shooting from a waist level, but doesn't work so well with side articulating screens and requires a tilt screen to be useful in quick moments.
4) You can use a D-pad like now to go through AF points like now.
5) Use C-AF+tracking so you can lock AF point to subject and then compose as wanted.