how to look the history report?,
If you want to contribute forum than just keep reporting bad posts and you will soon see your reports in this link:
https://bitcointalk.org/index.php?action=reportlist;mineif the moderator moves the topic, whatever the reporter did (if not in accordance with the board) will mark as good?
Yes in this case it will be market as good report, but sometimes it gets unhandled and nothing happens, so it all depends from moderators.
I just checked my reported post accuracy and it is around 97% but I don't really care about this stats, and I don't check history of reported post unless there is something suspicious.