Overall no, but really No in one sense and Yes in another. For the 'no', if I believe there is no lamppost there when in fact there is one and I walk into it, I will still get hurt! Believing what I like doesn't change the physical facts of what is there. On the other hand, from the 'yes' angle, everyone has their own view of the world and their own pre-conceived notions, so no two people will see the world alike.
Overall, I DON'T believe the mind has the power to *create* the world you exist in.... just that everyone's mind will *interpret* the surrounding facts differently to create their own unique view of the world.