他比你高三厘米，可以用以下几种方式表达：

1. He's three centimeters taller than me.

2. He is taller than me by three cm.

3. He is three centimeters higher than me.

4. He is 3 cm taller than I am.

这些表达方式都是正确的，可以根据具体语境选择合适的说法。