Iowa reported 769 new coronavirus cases in a 24-hour period ending Sunday morning — the state’s highest daily tally since the infection was discovered here four months ago.The record increase, recorded in the period ending at 11 a.m. Sunday, brings the state’s total to 34,528 cases since the beginning of the pandemic.Additionally, six new COVID-19 related deaths were reported in the period, raising the state’s total to 748.