Not true. According to Zogby Analytics, they said his approval is 51%. I believe this is the poll he was referring to.
https://zogbyanalytics.com/news/888-trump-s-job-approval-tops-50-a-majority-of-millennials-approve-of-trump-nearly-half-of-generation-z-voters-approve-of-trump-trump-is-winning-back-hispanic-independent-college-educated-and-urban-voters