Is the following sentence acceptable?
Your attitude determines your height.
(This sentence originally means that if your attitude is more active, positive and constructive, then you will broaden your horizons and get a higher achievement.)
That's not an idiom.
Your height (how tall you are) is determined by a number of physical factors (family and diet being the major ones). Attitude may make you a happier or a sadder person but it had little to do with how high you are. I believe what you are trying to write is, " Your attitude determines how much you can achieve."