How to set minimum SAT setpoint after the heating coil

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I want to control the minimum supply air temperature after the heating coil, how can I do it. So when my zone requires a supply air temp of 65 F and when the mixed air temperature is 65 F with the HVAC system of VAV with reheat my system is first cooling it down to 55 F and then the reheat terminal is heating it back to 65 F that's waste of energy how can I tell my system that when the mixed air temp is suitable for zone it should not cool it down to 55 F and then reheat it back to required zone supply temp.