YOU SAID:

彼を見送りに駅に行ってきたところだ。

INTO JAPANESE

彼を見送りに駅に行ってきたところだ。

BACK INTO ENGLISH

I have just been to the station to see him off.

INTO JAPANESE

私は彼を見送りに駅に行ったところです。

BACK INTO ENGLISH

I have just been to the station to see him off.