what do you think he will be in five years?还是what do you think will he be in five years

第一句是对的。就是what do you think he will be in five years这是一个带从句的复合句，所以，从句要用陈述句形式。

第一句对，原句还原：

Do you think what he will be in five years?

修改一下回答，应该1对，
http://zhidao.baidu.com/question/47548014.html?si=3

参考这个就可以了

第二句是对的，其中do you think是插入成分，可以忽略不看，句子是疑问句，所以用will he.