Why is there no 100% power in the POH power setting table? I've flown a piper cadet arrow. The airplane has an engine of 200 horsepower at 2700 RPM. According to the power setting table in the POH, the maximum power we can set is 75% horsepower. With 100% power, we could fly faster (more fuel would burn though). Why doesn't the manufacturer provide the 100% power setting?
There are no 100% power setting tables because it is impossible to cruise at 100% power with a normally aspirated engine.

100% power is rarely available, even at takeoff. 

It is only available at sea level when the temperature is 15C and the altimeter setting is 29.92".