Sorry, I couldn't find pricing data for that day. The closing price for Bitcoin (BTC) in terms of AUD on June 28, 2019 was 17,674.26. It was up 11% for the day.
DATE
OPEN
HIGH
LOW
CLOSE
June 28 2019
15,925.48
—
—
17,674.26
Daily pricing data for Bitcoin dates back to 7/14/2010, and may be incomplete.