Trump has since made the claim multiple times on Twitter, during interviews, and at rallies.

The Mueller Report specifically said that Trump was not exonerated from the claimed crimes.

Robert Mueller has since explicitly denied that his report exonerated the President of obstructing the Special Council investigation. This was reiterated in front of Congress.

NBC News – Mueller says his report does not exonerate President Trump
Forbes – Trump Puts Exoneration In All Caps — Almost As If He Were Exonerated