what name is his对吗

这肯定不对。正确的应该是：What is his name?这是特殊疑问句，中文意思是他叫什么名字？回答应该是：His name is Mike.像这样的句子有很多，列如：你多大了呀？

How old are you?Where are you from?What are you going to do this afternoon?等的be动词都在特殊疑问词的后面。