A 58-year-old woman with type 2 diabetes for 10 years is reviewed in clinic. Her last three HbA1c results over the past year are 7.8%, 8.0%, and 7.9%. She is on maximally tolerated metformin and a sulfonylurea. She has no established cardiovascular disease, but has hypertension and dyslipidaemia. According to Diabetes Canada glycaemic targets, what HbA1c goal is generally appropriate for most non-pregnant adults like her?