[Solved]-Highcharts - position column chart from the top-Highcharts

you could always set your drop-off series as a columnrange type.

     series: [
        {
            data: [300, 150, 85, 75, 35],
            pointwidth: 60,
            datalabels: {
                enabled: true,
                rotation: 90,
                color: 'white',
                align: 'right',
                inside: true,
                x:-10,
                style: {
                    fontsize: '25px',
                }
            }
        },
        {
            type: 'columnrange',
            data: [[0.5,150,300],[1.5,85,150],[2.5,75,85],[3.5,35,75]],
            color: '#ff8546',
            pointwidth: 20,
            grouppadding: -0.2
        }
    ]

see update fiddle here.