If I did, it would go two hundrded yards to the right or left. To understand how to change your ball flight, let's get you acquainted with what makes a ball fly or what we call the ball flight laws. These laws control your distance, direction and trajectory. It sounds as if you are imparting a good deal of speed to the ball since you can hit a five iron 185-200 yards. Therefore, check where you are hitting the ball on the club face.
Direction is controlled by clubface angle and the path of the club into the ball at impact.
The direction is predominately controlled by the clubface at impact. And vice versa for the left. The Modern Fundamentals of Golf has a great chapter on applying your hands. The path is the second directional control on the flight of the ball. That produces a shot that starts to the right of your target.