[Solved]-How can I change highcharts events after the chart has been initialized-Highcharts

It's not supported to update plotOptions in real time. jsFiddle.

You can update one-series options in that way:

chart.series[0].update({
  point: {
    events: {
      mouseOver: function() {
        $('#report').html('outer x: ' + this.x + ', y: ' + this.y);
      }
    }
  } 
});