Перевести в past форму, заменив says на said. Т.е. He said He... и далее заменить present на past, а future на future in the past.
1. He says, “I’ve just seen the report for the first time and I don’t agree with the conclusions”.
2. He says, “I can see that we are spending too much money on this project”.
3. He says, “I will be back in the office around 11”.
4. He says, “I’m going to process the order today”.
5. He says, “I want to check the figures again”.
6. He says, “I received your order yesterday”.
7. He says, “I have been working all day”.
8. He says, “I’m meeting Mr. Smith tomorrow”.
9. He says, “I don’t think it can be prepared, but I’ll do my best”.
10. He says, “Here in Japan this area of technology is very advanced”.

1.said that he had just seen the report...didn't agree2.said that he could see..we were spending3.said he would be back4.said that he was going5.said that he wanted6.said that he had received7.said that he had been working8.said that he would be meeting..the following day9.said that he didn't think it could be prepared,but he would do his best10.said that there...was very advanced.