Those numbers don’t match well with the CDC numbers: https://www.cdc.gov/coronavirus/2019-ncov/hcp/planning-scenarios.html
For age group 70-79, the estimated infection fatality rate is 5.4%.
However, President Trump will receive the best medical care on Earth. He will have open and immediate access to any and all treatments and no expense will be spared. He’ll have round-the-clock monitoring and immediate response to any change in his condition. I have no doubt he’ll come through this fine.