I just usually tell those with inquiries such as (apparently) this one to review their credit reports (free from the site below) to ensure there are no inaccuracies.
https://www.annualcreditreport.com/index.action
Further, read information, available at sites like the one below, to understand what comprises a credit score and and tips on improving it.
https://www.credit.com/credit-scores/how-to-raise-credit-score/
